Mobile workbench



March 16, 1954 J. M. BROCK MOBILE WORKBENCH Filed Feb. 26. 1952 FIG-4INVENTOR. John M. Brock HITOR/VE Patented Mar. 16, 1954 UN I TED S PATEN T "OFFI'QE .,MQBILE -WOKKBENQH John M. Brock, Millwood,-Wash.Application February 26, 19.52,.ScrialNos-273,447

' (c1.-2so 44) v1 Claim.

My present invention is a-mobile workbench and it isthe-primaryobject ofthe invention to provide a work bench which may rigidlysupport arelatively heavy shop machine by means of a supporting base adapted torest upon the floor and the base being providedwith vertically movablewheels adapted to raise one end of the bench and permit it to be movedin similar manner as a wheelbarrow.

Another object of the invention lies in the provision of spaced leverspivotally secured to the base and operably connected to the wheels attheir inner ends so that when the outer ends of the levers are tiltedupwardly, the wheels are lowered thereby and raise one end of the benchwhile the other end is carried by the levers.

Another object of the invention lies in the provision of a mobile workbench having retractible supporting wheels which are operated by levershaving telescopic sections for lengthening the levers.

Another object of the invention lies in the provision of means forrendering a work bench mobile and which is very inexpensive and easilymanufactured and assembled.

These and other objects of the invention will become apparent during thecourse of the following description.

In the accompanying drawings, forming a part of this specification, andin which like numerals are employed to designate like parts,

Figure 1 is a perspective view of a work bench embodying my invention,

Figure 2 is an enlarged perspective view of the inner end. of one leverand its companion reciprocating leg,

Figure 3 is a fragmentary vertical cross section taken transversely ofthe bench and showing an end portion of the lever pivoting shaft and itsbearing, and

Figure 4 is a side elevation of a modified form of the invention appliedto a work bench.

Referring now more particularly to the drawings, I have shown a workbench 5 as having a fiat bench top or working surface 6 supported by abase 1 comprising supporting legs 8 connected at their upper ends withhorizontally extending supporting boards forming a rectangular collar 9.Downwardly spaced from the top 6 I have shown a horizontal shelf itwhich serves to brace the legs 8.

Vertically disposed mounting boards I I are secured at each side of thebench to the collar 9 and shelf ill respectively at upper and lower endsof the boards ll. These boards are spaced from .2 th Il itudinal;centcrvof. thebenchztowardhne .endancl .areopposed toeach other transverselyof. the .bench. .Spaced. roller bearings v.Lil arc;.secured to boards.inaxial alisnmentbymsmns oflagscrews. or bolts I 3 and, a rotatableshaft ilfl isbearinged in .thepbearings and has,- its. end.portionsextending through axially aligned apertures l4 formed through the boardsII.

The end portions of the shaft l 4 are squared at I5 to receive thecooperating square apertures [6 in levers 20 and an axial socket I1 isdrilled and tapped in the end of the square portion I 5 to receive capscrew l8 for securing the levers 20 upon the ends l5 of shaft H.

Levers 20 are provided one on each side of the table and united forsimultaneous vertical tilting movement. Each lever 20 is provided withan extensible section 2| telescopically associated within its respectivelever and having an angular hand grip portion 22 disposed outwardly ofthe outer end of the lever.

The inner end of each lever is flattened to form ears 23 and alongitudinally extending slot 24 is formed therein. These fiat ears 23each extend between two spaced upstanding cars 25 which form a part of aU-shaped bracket 26 secured to the upper end of a verticaly reciprocableleg 21, one on each side of the table adjacent the end legs, and sleeves28 are secured vertically to the end legs 8 and encircle thereciprocable legs 21. A yoke 29 is secured to the lower end of eachreciprocable leg 21 and a Wheel 30 is rotatably carried thereby.

Wheels 30 are aligned with the side edges of the bench and are axiallyaligned each with the other, said axis being parallel with the rotatableshaft M.

The U-shaped bracket 26 has aligned openings in its ears 25 and a bolt31 is passed through these openings and secured as by a nut or riveting.A sleeve 38 is rotatably disposed over the bolt 31 and constitutes aroller for cooperating with the longitudinal slot 24 of ear 23.

Secured to the base 1 of the bench adjacent the end opposed to thewheels 3i! I have provided keepers 3| which limit the extreme positionsof the free end of vertically tiltable levers 20, and resilient latches32 are carried on this end to secure the levers in the raised position.A cable 33 unites the latches and is positioned to be pressed by theknee of the operator to withdraw the latches and permit the levers to belowered, thus raising the wheels and resting the bench upon its base 1.p

Figure 4 reveals a modified form of my invention which uses therotatable bar l4 pivotally mounting levers 34 which terminate at theirinner ends in a downward bend forming legs 35 which carry yokes 29 andwheels 30. A keeper 36 limits the movement of the leg 35 and, of course,the levers 34. Extensible sections 2i are provided for the levers 3A andlifting pressure on the levers free ends will cause the wheels to assumethe dotted position and lift one end of the bench while the operatorlifts the opposite end by means of the levers.

Having thus described my invention, I claim:

In a work bench having legs and a collar supporting a bench top, themeans for mobilizing the bench, comprising axially aligned horizontallyspaced vertically movable wheels, vertically disposed reciprocable legsrotatably carrying said wheels, sleeves secured to said bench andconstituting bearings through which said reciprocable legs pass, U-shaped brackets on the upper end of said legs and having transverselyaligned bolt receiving openings in the ears thereof, levers on each sideof the bench and rigidly secured on the end portions of a transverselyextending shaft, said shaft being rotatably mounted in bearings carriedby said bench and disposed parallel with the common axis of said wheels,ears on the inner end of said levers and disposed intermediate the earsof said U-shaped bracket, a longitudinally extending slot through eachsaid lever ear and communicating with said bolt receiving openings,bolts extending through said aligned openings and slot and securedtherein, a sleeve on each bolt and extending through said slot andconstituting a roller, extensible sections telescopcd in said levers,keepers carried by the bench and adapted to limit the vertical tiltingmovement of said levers, and latches on the bench and adapted toreleasably secure the outer ends of said levers in the raised positionwhereby said wheels are secured in the lowered position to support oneend of said bench.

JOHN M. BROCK.

References Cited in t he file of this patent UNITED STATES PATENTSMackin et al May 10, 1949

